Callus

(noun.) (botany) an isolated thickening of tissue, especially a stiff protuberance on the lip of an orchid.

(noun.) bony tissue formed during the healing of a fractured bone.

(verb.) form a callus or calluses; 'His foot callused'.

(verb.) cause a callus to form on; 'The long march had callused his feet'.

弗雷达录入